See, there is - NPCs provide all the risk a lot of us want. Proven by how big and how fast private groups are growning (Mobius is what, 2000ish players now)
The thing is, people play games to relax - having someone turn up, disable you for no reason (no comms, doesn't ask for or take any cargo) and whiz off again - that is not relaxing for most people (2 threads on this very issue today, one was shut down about 2 hours ago).
Actions like this are getting more common, the threads get shut down fast as each time it devolves in to those who like doing it telling people to go play solo if they don't like it. With thing like that going on, you cannot hope for anyone to want to play open - and these idiots think they are ruining the game and taking delight, but in fact they are helping boost the private groups where they cannot go... so really, only they will lose out in the end.
All I can suggest, is wait. Once those idiots get bored and move on, people will start to try open again - or you can join a private group to get the interactions you're looking for.